1. ALL Refers(RV) in a slide must have fans for best operation. They will work without fans but not at peak operation
2. The PIC in E bay you sent is a perfect example of good installation of the baffle. You want the cool air to flow completely thru the Condenser fins. Without that baffle, most of the air fails to go thru the fins. You also want to make sure the TOP of the refer above the Condenser fins is also baffled to force all hot air out the upper door and not allowed to go up into the cabinet
3. Very few OEMs install a GOOD BAFFLE SYSTEM. It is difficult to do in a mass installed production system.
4. Most slide room refers will do better with a 2nd fan mounted blowing out the upper door. That makes sure the air coming up from the bottom gets forced out faster and improves cooling.
5. Very few OEM's install fans on slide refers. They option the fan from either Dometic or Norcold that are mounted on the backside of the refer. Larger 4 door refers come standard with fans regardless of installed in a slide room or not. Doug